CVE-2024-21866: In Rapid Software LLC's Rapid SCADA versions prior to Version 5.8.4, the affected product responds back with a

Q: How do I fix CVE-2024-21866?

rapid scada: upgrade to newer than 5.8.4. Exact commands for each OS are on this page.

Q: Is CVE-2024-21866 being exploited?

CVE-2024-21866 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2024-21866 affect?

CVE-2024-21866 affects rapid scada. Severity is medium (CVSS 5.3). In Rapid Software LLC's Rapid SCADA versions prior to Version 5.8.4, the affected product responds back with an error message containing sensitive data if it receives a specific malformed request.

Q: How urgent is CVE-2024-21866?

Priority 32/100. Remotely exploitable, no login, no user action

Routine

MEDIUM 5.3REMOTEUPGRADE

CVE-2024-21866 is a medium-severity flaw (CVSS 5.3) affecting rapid scada. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Rapid Software LLC's Rapid SCADA versions prior to Version 5.8.4, the affected product responds back with an error message containing sensitive data if it receives a specific malformed request.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 65%)
CISA exploited list	No
Weakness	CWE-209
Published	2024-02-02
Last modified	2026-06-17

Publisher (CNA): ICS-CERT · Vendor: rapidscada

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-02-02 00:15 UTCPublished CVE record published
2026-06-17 07:10 UTCUpdated Record last modified

rapidscada rapid scada UPGRADE

Affected: <= 5.8.4

Fixed in: newer than 5.8.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy rapid-scada || rpm -q rapid-scada || rapid-scada --version

2. UPGRADE to newer than 5.8.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade rapid-scada

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade rapid-scada

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-21866?

rapid scada: upgrade to newer than 5.8.4. Exact commands for each OS are on this page.

Is CVE-2024-21866 being exploited?

CVE-2024-21866 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-21866 affect?

CVE-2024-21866 affects rapid scada. Severity is medium (CVSS 5.3). In Rapid Software LLC's Rapid SCADA versions prior to Version 5.8.4, the affected product responds back with an error message containing sensitive data if it receives a specific malformed request.

How urgent is CVE-2024-21866?

Priority 32/100. Remotely exploitable, no login, no user action

Related CVEs

CVE-2024-47221 HIGH 7.5 UPGRADE CheckUser in ScadaServerEngine/MainLogic.cs in Rapid SCADA through 5.8.4 allows an empty password.
CVE-2024-22096 MEDIUM 6.5 UPGRADE In Rapid Software LLC's Rapid SCADA versions prior to Version 5.8.4, an attacker can append path traversal cha
CVE-2024-22016 HIGH 7.8 UPGRADE In Rapid Software LLC's Rapid SCADA versions prior to Version 5.8.4, an authorized user can write directly to
CVE-2024-21869 MEDIUM 6.2 UPGRADE In Rapid Software LLC's Rapid SCADA versions prior to Version 5.8.4, the affected product stores plaintext cre
CVE-2024-21852 HIGH 8.8 UPGRADE In Rapid Software LLC's Rapid SCADA versions prior to Version 5.8.4, an attacker can supply a malicious config

References

← Back to latest CVEs